The word gluten isn’t considered to be mandatory information, it is the cereal (wheat, rye, barley, oats) that contains gluten whichmust be emphasised. Within the ingredients the word gluten can still be used, for example, wheatflour (gluten) or wheatflour (gluten) could be used, but it is the grain that must be emphasised. As it is now, the use of the word gluten is voluntary so some manufacturers will continue to do this.